$ rpm -qa --qf '%{SIZE} %{NAME}\n' | awk '{printf("%sMb %s\n", $1 / 1000 / 1000, $2)}' | sort -k1 -n
Enable “Subject:” logging in Postfix
Edit the Postfix’s main.cf file and add the following line (or uncomment it):
header_checks = regexp:/etc/postfix/header_checks
Create /etc/postfix/header_checks file and add the following line:
/^subject:/ WARN
Finally, reload/restart Postfix. From now on there will be a “warrning: header subject” in your maillog.
Dirty Little Secrets
You can find them here: http://interactive.fusion.net/dirty-little-secrets/
Quick Fix: Support for HiDPI in Caprine for Windows
In order to fix the wired looking (small) font of Caprine for Windows you just have to change (add) the “zoomFactor” parameter in ressources\app\index.js right after webPreferences:
zoomFactor: 1.2,
Save the file and re-run the app. The font should be readable now.
More about Caprine – https://github.com/sindresorhus/caprine
CentOS: Change default MTA (Mail Transfer Agent)
Here’s a simple way to change your default MTA on CentOS:
# alternatives --config mta There are 2 programs which provide 'mta'. Selection Command ----------------------------------------------- *+ 1 /usr/sbin/sendmail.sendmail 2 /usr/sbin/sendmail.ssmtp Enter to keep the current selection[+], or type selection number: 2 # sendmail -V sSMTP 2.61 (Not sendmail at all)